We have same problem. Server keeps crashing after 5-30 minutes. Other servers are also experiencing this problems. I advice you to check this link thread: http://forums.bistudio.com/showthread.php?174149-Multiple-crash-with-1-12
Is it somehow possible to see if someone was killed by friendlyfire? I've been running this mod for quite some time and the problem is teamkillers. It's really hard for admins to identify them.